JP3385302B2 - Absorption refrigeration equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type refrigerating apparatus having an absorption cycle in which an aqueous solution such as lithium bromide is used as an absorption liquid, and in particular, a plurality of cooling water pipes (absorption coils) are provided in an absorber. It relates to the structure for adjusting the flow rate of each cooling water pipe in the one arranged in.

[0002]

2. Description of the Related Art In an absorption refrigerating apparatus, a burner in a regenerator heats a low-concentration absorption liquid to bring it to a boil, thereby separating a high-concentration absorption liquid and a refrigerant vapor. The refrigerant vapor separated by the regenerator is cooled by the condenser to become a refrigerant liquid. The high-concentration absorbent separated by the regenerator is an absorption tube (absorption coil) in the absorber.
When the refrigerant liquid is sprayed on the surface of the evaporator and the refrigerant liquid is sprayed on the evaporator pipe (evaporation coil) in the evaporator provided in communication with the absorber, the refrigerant liquid is vaporized from the cold / hot water passing through the inside of the evaporator pipe on the surface of the evaporator pipe. It takes heat and evaporates, while on the surface of the absorption tube,
The high-concentration absorbent absorbs the refrigerant vapor and generates heat.

The cold / hot water from which heat has been removed in the evaporation pipe circulates through the heat exchanger provided in the object to be cooled by the operation of the pump and becomes a cooling source in the object to be cooled. On the contrary, the cold / hot water whose temperature has risen in the heat exchanger is cooled again in the evaporation pipe. On the other hand, the heat generated when the absorbing liquid absorbs the refrigerant vapor on the surface of the absorption pipe moves to the cooling tower provided outside by the cooling water for exhaust heat passing through the absorption pipe by the operation of the pump, and cools it. Emitted in the tower. The absorption cycle is configured such that the absorption liquid that has absorbed the refrigerant liquid in the absorber and has been reduced in concentration returns to the regenerator by the absorption liquid pump.

In the absorption type refrigerating apparatus having the above structure, the absorption coil provided as a coil-shaped cooling water pipe for passing exhaust heat cooling water for cooling the inside of the absorber has a surface area for heat exchange. Is provided as a double coil having different winding diameters so that the cooling is efficiently performed in the limited volume in the absorber. here,
Since the flow rate of the cooling water passing through each absorption coil must be divided according to the surface area of each absorption coil, an orifice member for limiting the flow rate in the absorption coil with the smaller surface area is welded or brazed. Are joined together to adjust the flow rate of the cooling water passing through the two absorption coils to a flow rate according to the surface area.

[0005]

As described above, in the conventional one in which the orifice member is joined in the absorption coil, welding or brazing is performed because the joining work is performed inside the cooling water pipe which becomes the absorption coil. Has a problem in that the workability is poor, it takes time, and it is difficult to make the bonding state uniform, so that the flow rate adjustment is not stable, and uneven quality is likely to occur.

According to the present invention, in manufacturing an absorption type refrigerating apparatus in which a plurality of absorption coils are provided in an absorber, the workability is not lowered and the flow rate of the cooling water passing through each absorption coil is appropriately adjusted. It is intended to be adjusted.

[0007]

According to the present invention, claim 1
A regenerator that heats an absorbing liquid containing a refrigerant to separate a refrigerant vapor from the absorbing liquid, a condenser that cools and condenses the refrigerant vapor separated by the regenerator, and a refrigerant liquid condensed by the condenser. An evaporator that evaporates under a low pressure, and a heat exchange that allows the absorption liquid supplied from the regenerator to absorb the refrigerant vapor evaporated in the evaporator and pass cooling water for absorbing the heat generated during the absorption. In an absorption type refrigeration system in which an absorption cycle is formed from an absorber having a pipe for internal use arranged therein, and a pump for returning the absorption liquid from the absorber to the regenerator, the absorption pipe is used as the heat exchange pipe of the absorber. A plurality of piping members having different heat exchange surface areas forming a plurality of flow paths in the vessel are provided, and a branch structure member having a branch structure for branching or merging a single flow path and a plurality of flow paths, Absorber The plurality of piping members are connected to a single external pipe for cooling water provided outside the absorber, and the flow rate of the cooling water passing through each of the plurality of piping members is set in the branch structure member. The technical means is to provide a flow rate adjusting structure for adjusting the flow rate corresponding to each heat exchange surface area of the plurality of piping members.

In a second aspect of the present invention, the technical means according to the first aspect is that the plurality of piping members of the absorber have a multi-coil shape wound concentrically with different winding diameters. According to a third aspect of the present invention, in the first and second aspects, the flow rate adjusting structure is an orifice structure formed in the plurality of branched flow paths of the branch structure member as technical means. According to a fourth aspect of the present invention, in the first to third aspects, a pipe for cooling water is provided inside the condenser, and the branch structure member includes the plurality of pipe members inside the absorber and the inside of the condenser. The technical means is to also serve as a connecting member for connecting with a single cooling water pipe. In claim 5,
In Claim 1 to 4, the said condenser is arrange | positioned above the said absorber, The said branch structure member is a side of the said absorber and the said condenser, and the said some piping member in the said absorber. The technical means is an elbow provided to connect with the single cooling water pipe in the condenser.

With the above structure, in the present invention, a plurality of pipe members are provided in the absorber as heat exchange pipes for passing cooling water, and these pipe members are formed by a branch structure member having a branch structure. It is connected to a single external pipe for cooling water outside the absorber. In the absorption cycle, when the absorption liquid is supplied from the regenerator to the absorption device, the refrigerant vapor in the absorption device is absorbed by the absorption liquid and generates heat at that time, but cools the heat exchange pipe in the absorption device. Heat is absorbed by the passage of water, and heat is exhausted to the outside of the absorber.

Here, a flow rate adjusting structure is provided in the branch structure member, and the flow rate of the cooling water passing through each pipe member constituting the heat exchange pipe is equal to the heat exchange surface area of each pipe member. The flow rates are adjusted to correspond to each other, and the flow rate is increased for a large heat exchange surface area and decreased for a small heat exchange surface area. As a result, the surface of the plurality of piping members has a cooling capacity corresponding to the amount of heat generated, which is proportional to the heat exchange surface area, and there is no large difference in the temperature of the cooling water after passing through the piping members. Therefore, there is no difference in the efficiency of heat exchange on the surface of each pipe member, the absorption of the refrigerant vapor by the absorber liquid does not vary among the pipe members, and the efficiency of the absorber does not decrease.

As described above, according to the present invention, the flow rate adjusting means for adjusting the flow rate of the cooling water passing through each pipe member in the absorber to make the heat exchange efficiency uniform is provided in the branch structure member. Has been. Therefore, it is possible to adjust the flow rate in each piping member only by incorporating the flow rate adjusting means in the branching structure member in advance, and to connect an orifice or the like for adjusting each flow rate in each piping member. You don't have to. The branch structure member is always used when connecting multiple piping members to a single external pipe for cooling water, etc. By doing so, it is easy to provide a function as a flow rate adjusting means. Therefore, it is not necessary to perform the work of attaching and joining members for adjusting the flow rate in each pipe member as in the conventional case, and the assembling work is not complicated.

As the flow rate adjusting means provided in the branch structure member, in addition to the above-mentioned orifice, each pipe diameter of a plurality of flow passages branched to a single flow passage corresponds to the heat exchange surface area of each pipe member. It may be made to be allowed.

[0013]

FIG. 1 shows an embodiment of an air conditioner according to the present invention. The air conditioner is composed of an outdoor unit 100 and an indoor unit RU as an absorption type refrigeration system, and the outdoor unit 100
Is a refrigerator main body 101 and a cooling tower (cooling tower) C
It is composed of T and T. The air conditioner is the control device 10
Controlled by 2.

The refrigerator main body 101 is mainly made of stainless steel and forms an absorption cycle of a refrigerant and an aqueous solution of lithium bromide as an absorbing liquid, and is a high temperature regenerator having a gas burner B as a heating means provided below. 1 and a low-temperature regenerator 2 arranged so as to cover the outside of the high-temperature regenerator 1, and a double-effect regenerator, and absorptions arranged on the outer periphery of the low-temperature regenerator 2 in this order toward the outside. Bowl 3
The evaporator 4 and the condenser 5 arranged above the absorber 3 and the evaporator 4 on the outer periphery of the low temperature regenerator 2 are connected by some passages. The absorbing solution contains an inhibitor for suppressing corrosion due to the reaction between stainless steel and lithium bromide.

The high temperature regenerator 1 is provided with a medium concentration absorbent separation column 1 above a heating tank 11 heated by a gas burner B.
2 is provided as an extension, and a vertical cylindrical airtight refrigerant recovery tank 10 is provided so as to cover the outer periphery of the medium concentration absorbent separation cylinder 12 from above.

Below the inside of the medium-concentration absorbent separation column 12,
An absorbent partitioning container 13 arranged at a distance from the inner wall of the medium-concentration absorbent separating column 12 is provided with several upper edges thereof joined to the inside of the medium-concentrating absorbent separating column 12.
Between the medium-concentration absorbent separating column 12 and the absorbent partition container 13, an absorbent rising passage 14 is formed in which the absorbent heated by the heating tank 11 rises.

In the medium-concentration absorbent separating column 12 above the absorbent partition 13 is provided an absorbent returning plate 15 for returning the absorbent rising in the absorbent rising passage 14.
The above-mentioned medium-concentration absorbent separating column 12 is used for this absorbent returning plate 1.
5 is composed of two members, an upper member located above 5 and a lower member located below, which are joined to the absorbent return plate 15 by welding.

At the side of the absorbent liquid partition container 13, the low-temperature regenerator 2 is provided with a medium-concentration absorbent liquid in which the refrigerant has been separated and the concentration thereof has been increased.
The inlet of the medium-concentration absorbent liquid flow path L1 for supplying to the evaporator 4 is opened, and the bottom of the absorbent partition 13 is for supplying the heated absorbent into the evaporator 4 during heating operation. The inlet of the heating absorbent liquid flow path L4 is open.

Inside the lower part of the refrigerant recovery tank 10, there is provided a refrigerant partitioning cylinder 17 for forming a heat insulating gap 17a between the medium concentration absorbent separating cylinder 12 and the medium concentration absorbent separating cylinder 12.
Is joined to. As a result, the medium-concentration absorbent separation column 1
The heat in 2 is cut off, and the refrigerant in the refrigerant recovery tank 10 becomes
It is not heated by the high temperature absorbing liquid in the absorbing liquid rising flow path 14. The inside of the refrigerant recovery tank 10 outside the refrigerant partition cylinder 17 is a refrigerant storage section 10a for storing the separated refrigerant, and the refrigerant storage section 10a has an inlet of a refrigerant flow path L5 communicating with the condenser 5. It is open.

With the above-described structure, in the high temperature regenerator 1, the low-concentration absorbent stored in the heating tank 11 is heated by the gas burner B to evaporate the water as the refrigerant in the low-concentration absorbent to evaporate the refrigerant. As a vapor (steam), it is separated to the outside of the medium-concentration absorbent separation column 12, and the medium-concentration absorbent concentrated by evaporation of the refrigerant vapor is returned to the inside of the medium-concentration absorbent separation column 12 inside the absorbent partition 13. Medium concentration absorbent liquid flow path L
1 to supply to the low temperature regenerator 2. Further, the separated refrigerant vapor is recovered by the refrigerant recovery tank 10 and supplied to the condenser 5 through the refrigerant flow path L5.

The low temperature regenerator 2 is a vertical cylindrical low temperature regenerator case 2 installed eccentrically on the outer periphery of the refrigerant recovery tank 10.
0, and a refrigerant vapor outlet 21 is provided around the ceiling of the low temperature regenerator case 20. Low temperature regenerator case 20
The top part of the ceiling is connected to the inside of the absorbent partition 13 inside the intermediate-concentration absorbent separating column 12 via the heat exchanger H by the intermediate-concentration absorbent liquid flow path L1.

An orifice (not shown) for limiting the flow rate of the medium-concentration absorption liquid flowing from the absorption-liquid partition container 13 to the low-temperature regenerator 2 is provided in the medium-concentration absorption liquid flow path L1. The medium-concentration absorbent is supplied into the container case 20 due to the pressure difference between the medium-concentration absorbent separating column 12.
(Approximately 70 mmHg in the low-temperature regenerator case 20, approximately 700 mmHg in the medium-concentration absorbent separation column 12)

As a result, in the low-temperature regenerator 2, the medium-concentration absorption liquid supplied into the low-temperature regenerator case 20 is reheated by using the outer wall of the refrigerant recovery tank 10 as a heat source, and the medium-concentration absorption liquid is regenerated by the low-temperature regenerator case. The vapor-liquid separation section 22 above 20 separates the refrigerant vapor and the high-concentration absorbent into the high-concentration absorbent receiving section 23. At the bottom of the high-concentration absorbent receiving part 23, an inlet of the high-concentration absorbent flow path L2 communicating with the absorber 3 is opened.

On the outer periphery of the low temperature regenerator case 20, a vertical cylindrical airtight evaporation / absorption case 30 is concentrically arranged in the lower part, and a condenser case 50 is concentrically arranged in the upper part. The low-temperature regenerator case 20 and the evaporation / absorption case 30 are integrally welded to the bottom plate portion 18, and the inner end of the bottom plate portion 18 is welded to the outer peripheral surface of the lower member 12b of the medium-concentration absorbent separation column 12. To form the refrigerator body 101. The inside of the low-temperature regenerator case 20 communicates with the inside of the condenser case 50 via the refrigerant vapor outlet 21 and the gap 5A.

The absorber 3 is an absorption pipe in which a copper pipe is wound in a vertical cylindrical shape between the inside portion of the evaporation / absorption case 30 and the low temperature regenerator case 20, and cooling water for exhaust heat flows inside. The absorption coil 31 wound in a coil shape is disposed as the above, and the high concentration absorbent is absorbed above the absorption coil 31.
A high-concentration absorbent sprayer 32 for spraying is arranged.

As shown in FIG. 2, the absorption coil 31 is provided on the outside of the low temperature regenerator case 20 and outside the absorption coil 31a.
And an inner absorption coil 32b, which is composed of two copper tubes that are wound inside and outside, and has an absorption coil inlet 311 below and an absorption coil outlet 312 above.
Each is provided toward the outside of the evaporation / absorption case 30, the absorption coil inflow port 311 is connected to the cooling water flow path 34 via a diversion elbow (not shown), and the absorption coil outflow port 312 is connected to the confluence elbow. 313 is connected.

The confluent elbow 313 is the evaporation / absorption case 3
The cooling water for exhaust heat flowing out from the absorption coil outlet 312 provided so as to project toward the outside of 0 is merged by changing the flow direction of the cooling water for exhaust heat upward, and further after merging, to the center of the condenser case 50. In order to change the direction of the cooling water for exhaust heat, it has a bending structure twice in the flow direction,
The outlet side is connected to the inlet of the cooling coil 51 of the condenser 5.

Of the inflow conduits of the confluent elbow 313, the inflow conduit 313a which is connected to the outer absorption coil 31a.
Is a pipe line having a constant diameter and forming a uniform cross-sectional area so that the exhaust heat cooling water flowing out from the outer absorption coil 31a can pass smoothly. An orifice 314 for limiting the flow rate of the exhaust heat cooling water is provided in the connected inflow conduit 313b. The orifice 314 is integrally formed (insert molding) when the confluent elbow 313 made of rubber is molded. This orifice 314
Of the two absorption coils 31, the flow rate of the cooling water for exhaust heat passing through the inner absorption coil 31b having the smaller heat exchange surface area corresponds to the surface area of the outer absorption coil 31a having the larger heat exchange surface area. This is for limiting the flow rate so that the heat exchange efficiency in each absorption coil 31 is uniform.

As shown in FIG. 4, the high-concentration absorbent dispersion device 32 has a high-concentration absorbent flow path L2 connected to the high-concentration absorbent receiving part 23 of the low temperature regenerator 2 via a heat exchanger H. Absorbing liquid cooling container 32a that cools by receiving and storing the high-concentration absorbing liquid supplied via
In order to distribute and drip the absorbing liquid stored in the drip amount on each circumference of the absorbing coil 31 which is wound inside and outside, in a dropping amount ratio corresponding to the surface area ratio of the absorbing coils 31a and 31b, It is composed of two absorption liquid dispersion pipes 32b formed in. In each of the absorbing liquid dispersion pipes 32b, the number of dropping holes and the diameter of the dropping holes are set so that the absorbing liquid is dispersed evenly on the circumference.

With the above-described structure, in the absorber 3, the high-concentration absorption liquid of the high-concentration absorption liquid receiving portion 23 of the low-temperature regenerator 2 flows in from the high-concentration absorption liquid channel L2 due to the pressure difference, and the high-concentration absorption liquid that has flowed in is absorbed. The liquid is sprayed on the upper end of the absorption coil 31 by the high-concentration absorbent sprayer 32, adheres to the surface of the absorption coil 31 to form a thin film, and flows downward due to the action of gravity, absorbs water vapor, and has a low concentration. It becomes an absorbing liquid. When absorbing this water vapor, heat is generated on the surface of the absorption coil 31.
It is cooled by the exhaust heat cooling water circulating in 1.

Here, the two absorption coils 31a and 31b
The cooling water for exhaust heat passing through is set by the orifice 314 in the confluent elbow 313 so that the flow rate passing through the outer absorption coil 31a is higher than the flow rate passing through the inner absorption coil 31b. On the surfaces of the inner and outer absorption coils 31a and 31b, a difference in heat exchange capacity is generated so as to correspond to the amount of heat generated, which is proportional to the heat exchange surface area, and the absorption coils 31a and 31b are heated to the same temperature. Exhaust heat cooling water flows out and joins the elbow 3
After being merged at 13, it further flows into the cooling coil 51 in the condenser 5 described later. The water vapor absorbed by the absorbing liquid is generated as a refrigerant vapor in the evaporator 4 described later.

The bottom portion 33 of the absorber 3 is connected to the bottom portion of the heating tank 11 by a low-concentration absorption liquid flow path L3 in which the heat exchanger H and the absorption liquid pump P1 are mounted. The low-concentration absorption liquid in the absorber 3 is supplied into the heating tank 11. In addition, in the absorption coil 31, the cooling water for exhaust heat cooled by the cooling tower CT during the cooling operation,
Shunt elbow 315 connected to absorption coil inlet 311
It is divided into two by the inflow, then flows in, is merged by the confluent elbow 313, then flows out, and is circulated through the cooling coil 51 of the condenser 5.

The evaporator 4 is provided on the outer circumference of a partition plate 40 having a vertical cylindrical shape provided on the outer circumference of the absorption coil 31 in the evaporation / absorption case 30 and having a large number of communication ports (not shown). A vertical cylindrical evaporation coil 41 made of a copper tube through which cold / hot water flows is arranged, and a refrigerant liquid spraying tool 42 is mounted above it. The bottom 43 of the evaporator 4 communicates with the bottom of the absorbent partition 13 in the medium-concentration absorbent separating column 12 through a heating absorbent flow path L4 having an electromagnetic cooling / heating switching valve 6.

With the above configuration, in the evaporator 4, when the refrigerant liquid (water) is made to flow down onto the evaporation coil 41 from the refrigerant liquid spraying tool 42 during the cooling operation, the flowing-down refrigerant liquid is caused by the surface tension of the evaporation coil. The surface of 41 is wetted to form a film, which is lowered by the action of gravity to a low pressure (for example, 6.5 mm).
In the evaporation / absorption case 30 of Hg), heat of vaporization is taken from the evaporation coil 41 to evaporate, and the cold water for air conditioning flowing in the evaporation coil 41 is cooled.

Next, the condenser 5 will be described. The condenser 5 is
Inside the condenser case 50, a cooling coil 51 is arranged in which cooling water for exhaust heat cooled by the cooling tower CT circulates. As shown in FIG. 4, the condenser case 50 covers a boundary plate 52 that closes the upper opening of the evaporation / absorption case 30 and forms the bottom of the condenser case 50, and forms a condenser chamber by covering the boundary plate 52. And a condenser cover plate 53.

Between the cooling coil 51 and the boundary plate 52,
A refrigerant liquid receiving portion 50a for receiving the liquefied refrigerant liquid of the refrigerant vapor cooled by the cooling coil 51 in the condenser case 50 is provided, and the refrigerant liquid receiving portion 50a is below the boundary plate 52 and is an absorber. A boundary plate assembly is formed by pre-assembling together with the high-concentration absorbent sprayer 32 of No. 3 and the refrigerant cooler 54 provided for cooling the refrigerant to be sprayed to the evaporation coil 41 of the evaporator 4. .

In the condenser cover plate 53, the cooling coil 51 is a coil support fitting 51a, and an eliminator 55 made up of several members including a part of the medium-concentration absorbent liquid flow path L1 is pre-assembled inside the condenser cover plate 53. A condenser assembly is formed. Both ends of the cooling coil 51 are arranged adjacent to the outer peripheral portion of the condenser cover plate 53 as an inflow portion and an outflow portion to the condenser 5, respectively.

In the condenser 5 having the above structure, the refrigerant storage portion 1 of the refrigerant recovery tank 10 is constituted by the refrigerant passage L5 provided with an orifice (not shown) for limiting the refrigerant flow rate.
0a, and also communicates with the low temperature regenerator 2 via the refrigerant vapor outlet 21 and the gap 5A, both of which are supplied with refrigerant by a pressure difference (about 70 mmHg in the condenser case).

In the condenser 5, the refrigerant vapor supplied into the condenser case 50 is cooled by the cooling coil 51 and liquefied. Refrigerant liquid receiver 50 provided at the bottom of the condenser 5
The refrigerant liquid sprayer 42 disposed above the evaporation coil 41 of the evaporator 4 is in communication with the refrigerant liquid supply path L6.
The liquefied refrigerant liquid is supplied to the refrigerant liquid supply path L6 and the refrigerant cooler 5
It is supplied to the refrigerant liquid spraying tool 42 via 4.

With the above-described structure, the absorbing liquid is a high temperature regenerator 1 → a medium concentration absorbing liquid flow path L1 → a low temperature regenerator 2 → a high concentration absorbing liquid flow path L2 → a high concentration absorbing liquid sprayer 32 → an absorber 3 → The absorption liquid pump P1 is circulated in the order of the low concentration absorption liquid flow path L3 and the high temperature regenerator 1. The refrigerant is the high temperature regenerator 1 (refrigerant vapor) → refrigerant flow path L5 (refrigerant vapor) or low temperature regenerator 2 (refrigerant vapor) → condenser 5 (refrigerant liquid) → refrigerant supply path L6 (refrigerant liquid) → refrigerant. The liquid spraying tool 42 (refrigerant liquid) → evaporator 4 (refrigerant vapor) → absorber 3 (absorption liquid) → absorption liquid pump P1 → low-concentration absorption liquid flow path L3 → high temperature regenerator 1 circulates in this order.

The absorption coil 31 of the absorber 3 and the cooling coil 51 of the condenser 5 which exchange heat with the absorbing liquid are connected to form a continuous coil, and the continuous coil is formed by the cooling water passage 34 in the cooling tower. It is connected to CT to form a cooling water circulation path. In this cooling water circulation path, the absorption coil 3
In the cooling water flow path 34 between the inlet of 1 and the cooling tower CT, a cooling water pump P2 for feeding the cooling water into the continuous coil.
The cooling water passing through the continuous coil by the operation of the cooling water pump P2 absorbs the absorption heat in the absorption coil 31 and the condensation heat in the cooling coil 51, respectively, and becomes relatively high temperature. Supplied to CT.

With the above construction, during the cooling operation, the cooling water in the cooling tower CT is operated by the cooling water pump P2 in the order of cooling tower CT → cooling water pump P2 → absorption coil 31 → cooling coil 51 → cooling tower CT. Circulate. In the cooling tower CT, self-cooling is performed to partially evaporate the cooling water that falls into the atmosphere and cool the remaining cooling water.
It forms an exhaust heat cycle that radiates heat to the atmosphere and lowers the temperature. Note that the blowing of air from the blower S promotes the evaporation of water.

The evaporation coil 41 of the evaporator 4 includes an indoor unit R
The air conditioning heat exchanger 44 provided in U is connected by the cold / hot water flow path 47, and the cold / hot water flow path 47 has a cold / hot water pump P3.
Is provided. With the above configuration, the evaporation coil 41
The cold / hot water having a low temperature circulates in the order of the evaporation coil 41 → the cold / hot water passage 47 → the air conditioning heat exchanger 44 → the cold / hot water passage 47 → the cold / hot water pump P3 → the evaporation coil 41.

The indoor unit RU is provided with an air conditioning heat exchanger 44, and a blower 46 that allows room air to pass through the heat exchanger 44 and blows the indoor air again.

The heating absorbent flow path L4 and the heating / cooling switching valve 6 are provided for heating operation. During heating operation, the cooling / heating switching valve 6 is opened and the absorption pump P1 is operated. As a result, the high-temperature medium-concentration absorption liquid in the absorption-liquid partition container 13 in the medium-concentration absorption liquid separation cylinder 12 flows into the evaporator 4, and the cold / hot water in the evaporation coil 41 is heated and the heated evaporation is performed. The cold / hot water in the coil 41 is supplied from the cold / hot water passage 47 to the air conditioning heat exchanger 44 by the operation of the cold / hot water pump P3, and serves as a heat source for heating. The medium-concentration absorption liquid in the evaporator 4 enters the absorber 3 side from the communication port of the partition plate 40, passes through the low-concentration absorption liquid channel L3, and then the absorption liquid pump P1.
Is returned to the heating tank 11.

In the air conditioner of the present embodiment having the above-mentioned structure, the absorption coil 31 provided in the absorber 3 is doubled.
The cooling water for exhaust heat flowing inside the absorption coil 31 and the condenser 5
Due to the orifice 314 formed in the confluent elbow 313 that connects with the cooling coil 51 therein, the flow rate of the cooling water flowing to the inner absorption coil 31b having a small heat exchange surface area is smaller than that of the outer absorption coil 31a having a large heat exchange surface area. Since the flow rate is adjusted so as to be smaller than the flow rate of the cooling water that flows, it is possible to adjust the flow rate to correspond to the flow rate of the absorbing liquid flowing down the absorption coils 31a and 31b. Therefore, there is no difference in the efficiency of heat exchange between the two absorption coils 31a and 31b, and the cooling water having substantially the same temperature can be cooled by the condenser 5 after the merging.
Can be supplied to the cooling coil 51.

The confluent elbow 313 for adjusting the flow rates of the two absorption coils 31a and 31b is always provided for connecting the absorption coil 31 and the cooling coil 51, and is not provided. Since it is not provided separately for adjusting the flow rate, if the orifice 314 is formed in advance in the confluent elbow 313 at the time of forming the confluent elbow 313, the labor in the assembly process for adjusting the flow rate increases. Without it, a means for adjusting the flow rate can be easily incorporated. Therefore, it is not necessary to perform work such as attaching and joining members for adjusting the flow rate in the absorption coil 31, and the assembling work is not complicated.

In the above embodiment, the orifice 314 is formed in the confluent elbow 313 to adjust the flow rate of the absorption coil 31, but as shown in FIG.
In order to reduce the flow rate of the cooling water flowing through the inner absorption coil 31b, an orifice is formed in the outflow conduit 315b connected to the inner absorption coil 31b in the diversion elbow 315 connected to the first inlet. The flow rate may be adjusted. In each of the above-described embodiments, the cooling tower CT of the cooling water flow path 34 is an open type in which a part of the cooling water is evaporated to self-cool the cooling water, but the cooling water circulating in the cooling water flow path 34 is It may be a water cooling device that forms a closed circuit that is not open to the atmosphere. In the above-described embodiment, the indoor unit RU is provided with only the air conditioning heat exchanger 44, but in order to perform the dehumidifying operation without lowering the indoor temperature, the air conditioning heat exchanger 4
A heating heat exchanger that heats the air once cooled in step 4 may be provided in parallel with the air conditioning heat exchanger 44. In the above embodiment, the air conditioner using the absorption type refrigerating device is shown.
It may be used for other refrigerating devices such as a refrigerator and a freezer. In the above-described embodiment, the double-effect formula has been described, but the single-effect formula may be used. A petroleum burner or an electric heater may be used as the heating source.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner showing an embodiment of the present invention.

FIG. 2 is an assembly diagram showing an internal structure of an absorber in an air conditioner showing an embodiment of the present invention.

FIG. 3 is a view showing a confluent elbow of an absorber in an air conditioner showing an embodiment of the present invention, (a) is a side view, and (b) is a sectional view taken along line BB in (a).

FIG. 4 is a partial cross-sectional view of a refrigerator main body showing a combined portion with a condenser and an evaporator in an embodiment of the present invention.

FIG. 5 is an assembly diagram showing an absorber and a diversion elbow in an air conditioner according to another embodiment of the present invention.

[Explanation of symbols]

101 Refrigerator body (absorption type refrigerator) 1 High temperature regenerator 2 low temperature regenerator 3 absorber 31 Absorption coil (plurality of piping members) 313 Confluent elbow (branch structure member, connecting member)) 314 Orifice (flow rate adjustment structure) 34 Cooling water flow path (external piping for cooling water) 4 evaporator 5 condenser 51 Cooling coil (cooling pipe) P1 absorption pump

Claims (5)

(57) [Claims] 1. A regenerator that heats an absorbing liquid containing a refrigerant to separate a refrigerant vapor from the absorbing liquid, a condenser that cools and condenses the refrigerant vapor separated by the regenerator, and a condenser. An evaporator for evaporating the condensed refrigerant liquid under a low pressure, and a cooling water for absorbing the refrigerant vapor evaporated by the evaporator into the absorbing liquid supplied from the regenerator and absorbing the heat generated during the absorption. In an absorption type refrigeration system in which an absorption cycle is formed from an absorber having a heat exchange pipe for passing the inside thereof and a pump for returning the absorption liquid from the absorber to the regenerator, As a pipe, a plurality of pipe members having different heat exchange surface areas forming a plurality of flow passages in the absorber are provided, and a branch structure member having a branch structure for dividing or joining a single flow passage and a plurality of flow passages. Through Then, the plurality of piping members of the absorber are connected to a single external pipe for cooling water provided outside the absorber, and the plurality of piping members pass through the branch structure member. An absorption type refrigerating apparatus comprising a flow rate adjusting structure for adjusting a flow rate of the cooling water to be adjusted to a flow rate corresponding to each heat exchange surface area of the plurality of piping members. 2. The absorption refrigerating apparatus according to claim 1, wherein the plurality of piping members of the absorber have a multi-coil shape in which they are concentrically wound with different winding diameters. 3. The absorption refrigerating apparatus according to claim 1, wherein the flow rate adjusting structure is an orifice structure formed in the plurality of branched flow paths of the branch structure member. 4. A pipe for cooling water is provided inside the condenser, and the branch structure member includes the plurality of pipe members in the absorber and the single pipe for cooling water in the condenser. 2. The connecting member for connecting the terminals also serves as a connecting member.
4. The absorption type refrigerating apparatus according to any one of 1 to 3. 5. The condenser is arranged above the absorber, and the branch structure member is a side of the absorber and the condenser, and the plurality of piping members in the absorber and the condenser. An absorption refrigeration system according to any one of claims 1 to 4, which is an elbow provided to connect with the single cooling water pipe in the container.